IMF agrees $12 billion 3-year funding deal with Egypt

* IMF loans to help budget deficit and dollar shortage * Deal still to be approved by IMF executive committee * Markets cautious, pending implementation (Adds stock market rise, analyst comment, background, quotes) By Lin Noueihed and Ahmed Aboulenein CAIRO, Aug 11 (Reuters) - The International Monetary Fund has agreed in principle to grant Egypt a $12 billion three-year loan facility, to support a government reform programme aimed at plugging a budget gap and rebalancing the currency markets. T